Psyllium hulls come from the seeds of Ribwort and Broad leaf Plantain which is a common plant in the UK. It has the highest level of soluble fibre known, more than eight times that of oat bran. Encapsulated Psyllium hulls are a convenient way to add important fibre to the daily diet. Psyllium hulls can play an important part in helping the body maintain a healthy cardiovascular system.